package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDIshMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.function.ToDoubleBiFunction;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    SetmealMapper setmealMapper;
    @Autowired
    SetmealDIshMapper setmealDishMapper;
    @Autowired
    CategoryMapper categoryMapper;
    @Autowired
    DishMapper dishMapper;


    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Transactional
    @Override
    public SetmealVO getById(Long id) {
        SetmealVO setmealVO = new SetmealVO();

        Setmeal setmeal = setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setCategoryName(categoryMapper.getCategoryNameById(setmeal.getCategoryId()));
        List<SetmealDish> setmealDishList = setmealDishMapper.getSetmealWithDishBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishList);
        return setmealVO;
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> setmealVoPage = setmealMapper.pageQuery(setmealPageQueryDTO);
        List<SetmealVO> result = setmealVoPage.getResult();
        long total = setmealVoPage.getTotal();
        //result.forEach(r -> r.setCategoryName(categoryMapper.getCategoryNameById(r.getCategoryId())));//设置vo的分类名称
        return new PageResult(total,result);
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.saveSetmeal(setmeal);//mapper.xml中设置主键回显
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmeal.getId()));//为setmeal_dish插入setmeal的id
        setmealDishMapper.saveSetmealDishes(setmealDishes);
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealMapper.update(setmeal);
        setmealDishMapper.deleteSetmealDishBySetmealId(setmeal.getId());

        if(setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmeal.getId()));
            setmealDishMapper.saveSetmealDishes(setmealDishes);
        }
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //删除setmeal_dish表中的数据
        setmealDishMapper.deleteSetmealDishBySetmealIds(ids);
        //删除setmeal表中的数据
        setmealMapper.delete(ids);
    }

    /**
     * 套餐起售，停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getDishBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if (dish.getStatus() == StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = new Setmeal().builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
